Where the Heart Is 1999

From Amazon:
Not to be confused with the 1990 comedy flop featuring Uma Thurman, this Where the Heart Is boasts a winning performance from Natalie Portman. Novalee Nation (Portman), a pregnant teenager from Tennessee, is bound for California with her worthless boyfriend, Willy Jack (Dylan Bruno). A pit stop at an Oklahoma Wal-Mart proves fateful when Willy Jack abandons her there. She secretly sets up camp at the megastore and spends her days meeting with kindly booster Sister Husband (Stockard Channing) and eccentric librarian Forney Hall (James Frain). Her life takes another turn after she gives birth in the store (clean up, aisle six!)...